Too harsh, not enough roleplayability, could potentially be not fun
I agree about the limited roleplay potential, and certainly the harshness given that I think the original Ego Draconis still holds the record for the most times I've ever died, but it still remains one of my favourite games
evar. My only real complaint is that there wasn't quite enough of it, or more specifically that there wasn't enough before the dragon half of the game, which seems to be a common complaint.
Nowadays I think I'd also like companions, but as the Original Sins are doing that I doubt it's much of a worry (okay, the voice-in-your-head was a kind of companion, but you know what I mean).
ED/D2/DKS/whatevs seems the controversial choice in many ways but actually I really loved it: to some extent it made the Divinity series accessible to someone who wasn't into the Divine Divinity style of gaming, but I'd still like to see more of it.